diff options
Diffstat (limited to 'usr/src/lib/libast/common/sfio/sfclose.c')
| -rw-r--r-- | usr/src/lib/libast/common/sfio/sfclose.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/sfio/sfclose.c b/usr/src/lib/libast/common/sfio/sfclose.c new file mode 100644 index 0000000000..fdfa271228 --- /dev/null +++ b/usr/src/lib/libast/common/sfio/sfclose.c @@ -0,0 +1,168 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#include "sfhdr.h" + +/* Close a stream. A file stream is synced before closing. +** +** Written by Kiem-Phong Vo +*/ + +#if __STD_C +int sfclose(reg Sfio_t* f) +#else +int sfclose(f) +reg Sfio_t* f; +#endif +{ + reg int local, ex, rv; + Void_t* data = NIL(Void_t*); + + SFMTXSTART(f, -1); + + GETLOCAL(f,local); + + if(!(f->mode&SF_INIT) && + SFMODE(f,local) != (f->mode&SF_RDWR) && + SFMODE(f,local) != (f->mode&(SF_READ|SF_SYNCED)) && + _sfmode(f,SF_SYNCED,local) < 0) + SFMTXRETURN(f,-1); + + /* closing a stack of streams */ + while(f->push) + { reg Sfio_t* pop; + + if(!(pop = (*_Sfstack)(f,NIL(Sfio_t*))) ) + SFMTXRETURN(f,-1); + if(sfclose(pop) < 0) + { (*_Sfstack)(f,pop); + SFMTXRETURN(f,-1); + } + } + + rv = 0; + if(f->disc == _Sfudisc) /* closing the ungetc stream */ + f->disc = NIL(Sfdisc_t*); + else if(f->file >= 0) /* sync file pointer */ + { f->bits |= SF_ENDING; + rv = sfsync(f); + } + + SFLOCK(f,0); + + /* raise discipline exceptions */ + if(f->disc && (ex = SFRAISE(f,local ? SF_NEW : SF_CLOSING,NIL(Void_t*))) != 0) + SFMTXRETURN(f,ex); + + if(!local && f->pool) + { /* remove from pool */ + if(f->pool == &_Sfpool) + { reg int n; + + POOLMTXLOCK(&_Sfpool); + for(n = 0; n < _Sfpool.n_sf; ++n) + { if(_Sfpool.sf[n] != f) + continue; + /* found it */ + _Sfpool.n_sf -= 1; + for(; n < _Sfpool.n_sf; ++n) + _Sfpool.sf[n] = _Sfpool.sf[n+1]; + break; + } + POOLMTXUNLOCK(&_Sfpool); + } + else + { f->mode &= ~SF_LOCK; /**/ASSERT(_Sfpmove); + if((*_Sfpmove)(f,-1) < 0) + { SFOPEN(f,0); + SFMTXRETURN(f,-1); + } + f->mode |= SF_LOCK; + } + f->pool = NIL(Sfpool_t*); + } + + if(f->data && (!local || (f->flags&SF_STRING) || (f->bits&SF_MMAP) ) ) + { /* free buffer */ +#ifdef MAP_TYPE + if(f->bits&SF_MMAP) + SFMUNMAP(f,f->data,f->endb-f->data); + else +#endif + if(f->flags&SF_MALLOC) + data = (Void_t*)f->data; + + f->data = NIL(uchar*); + f->size = -1; + } + + /* zap the file descriptor */ + if(_Sfnotify) + (*_Sfnotify)(f,SF_CLOSING,f->file); + if(f->file >= 0 && !(f->flags&SF_STRING)) + CLOSE(f->file); + f->file = -1; + + SFKILL(f); + f->flags &= SF_STATIC; + f->here = 0; + f->extent = -1; + f->endb = f->endr = f->endw = f->next = f->data; + + /* zap any associated auxiliary buffer */ + if(f->rsrv) + { free(f->rsrv); + f->rsrv = NIL(Sfrsrv_t*); + } + + /* delete any associated sfpopen-data */ + if(f->proc) + rv = _sfpclose(f); + + /* destroy the mutex */ + if(f->mutex) + { (void)vtmtxclrlock(f->mutex); + if(f != sfstdin && f != sfstdout && f != sfstderr) + { (void)vtmtxclose(f->mutex); + f->mutex = NIL(Vtmutex_t*); + } + } + + if(!local) + { if(f->disc && (ex = SFRAISE(f,SF_FINAL,NIL(Void_t*))) != 0 ) + { rv = ex; + goto done; + } + + if(!(f->flags&SF_STATIC) ) + free(f); + else + { f->disc = NIL(Sfdisc_t*); + f->stdio = NIL(Void_t*); + f->mode = SF_AVAIL; + } + } + +done: + if(data) + free(data); + return rv; +} |